yashsingh1/xdaforums huggingface dataset:
[G2 Q&A, Help & Troubleshooting] slickwidnick:
update on screen issue findings

So recently I just purchased another LG g2, one without this touch screen issue, and for the sake of education I decided to put the non-affected phone into the rest of the affected phone. I wasn't sure if I was risking passing the bug on to the non-affected motherboard, so I quickly tried a couple of things. I turned on the quickmemo app and noticed that the half Inch band of dead space about an inch down from the top of the screen was still there. I tried the knock off on the status bar, the screen shut off, I tried the knock on while the screen was off, and it did not work. I'm not going to try to say this proves any kind of theory about where this bug lies or what it affects because, although I am becoming more and more familiar with the way android phones funtion, I am no developer or technician. This is all I fiddled around with cause like I said, I didn't want something to mess up my perfectly working new phone, but I hope this sheds more light on this quite annoying problem.
[G2 Q&A, Help & Troubleshooting] AharonBLevi:
So what conclusion did you get from this??
[G2 Q&A, Help & Troubleshooting] slickwidnick:
Well, the fact that when i switched the working motherboard into the buggy housing, the dead zone was still there and that makes that problem seem like a hardware failure of some sort, but since i didnt do any more tests, i cant say 100% if its failure is due to a software glitch that somehow "breaks" the digitizer, or if its a manufacturing defect/design flaw. I'd want to switch em out and try more tests cause it would probably really help with fixing the issue, but i dont know 100% that it wont duplicate onto the properly working phone that i currently use day to day
[G2 Q&A, Help & Troubleshooting] billykxda:
Again, I am hopeful that there are lots of G2's that don't exhibit this issue. Glad to hear that you are in that group!
[G2 Q&A, Help & Troubleshooting] yutlin:
Anyone know how to get to this information on the Sprint (LS980) variant?
[G2 Q&A, Help & Troubleshooting] billykxda:
Please let us know the outcome.

-bk
[G2 Q&A, Help & Troubleshooting] BlastTyrantKM:
This just started to happen on mine, after nearly 2 weeks of flawless operation. It started EXACTLY after I installed Nova Launcher. Like, within 5 minutes. 2 reboots did not fix the problem at all. The 3rd reboot got the screen working well enough to enter settings and delete Nova. The problem was 98% fixed after going back to LG Home launcher. There were just a couple instances of having to click something several times for the click to register. I'm doing a full wipe and reinstalling factory firmware. I was rooted but hadn't flashed any ROMs. I'll report back once I'm done restoring. Hopefully, this fixes it
[G2 Q&A, Help & Troubleshooting] billykxda:
Bummer. I look forward to hearing a good outcome.
[G2 Q&A, Help & Troubleshooting] BlastTyrantKM:
I'm back on rooted stock, everything is working fine now. So far, not a hint of the screen jitters. Hope it stays that way. Maybe the problem will be fixed with our rumored 4.4 update by the end of December.
[G2 Q&A, Help & Troubleshooting] Norside:
Have anyone asked lg and got an answer on this (probably) common problem with lg g2? And do anyone know if a fix is on the way? This phone would been totally awesome if they got a fix to it!
[G2 Q&A, Help & Troubleshooting] billykxda:
I've done extensive research and have not heard that any one has approached, nor otherwise heard from, LG. I am not sure exactly how to do that. Maybe it's best to use a very public forum like FB or G+.

If anyone knows how to actually get to LG folks that can make a change happen, please post here.
[G2 Q&A, Help & Troubleshooting] billykxda:
One more thing regarding this touchscreen issue...

Yesterday, I was able to make this issue surface rather reliably by just typing in a few paras of text - not that this will work every time for everyone, on every day - it was simply repeatable for me yesterday. I was also able to make it happen later in the day when I was scrolling a lot in the browser and moving between home screens in the launcher. It's entirely likely, that this issue will not surface today, or maybe it will - it's appears random, but I suspect it's not.

Here's the clincher regarding "is it software" or "is it hardware"...

If I go to Quick Memo during a period of erratic behavior to try to draw straight lines (as mentioned earlier in this thread and on YouTube), it of course results in lines that look like an EKG printout. All of the erratic phantom touches are recorded in full color. Indisputable evidence. IMO.

But, this ONLY happens if the background is transparent. If I make the background the default color, the lines will be dead straight - just like I had drawn them.

Current Conclusion: this is a software issue. Phantom touches are phantom touches - caused by a software setting that is too sensitive, poor input touch filtering, or something like that. It's far more likely that recording phantom touches on one background color, but not another, is a software issue. A broken/defective touchpad grid (or similar hardware issue) is not likely to know what color is on screen at the time of the phantom touches. But, the software might be aware of that.

If so, it should be correctable in a future patch, IF LF knows about this.
[G2 Q&A, Help & Troubleshooting] Norside:
Yes I think the public way is the way to go.. Would really be interessed to see what Lg would reply on this..

Anyways have anyone experienced this issue with cyanogenmod? If not then this has to be a software issue I think.
[G2 Q&A, Help & Troubleshooting] yutlin:
Has anyone experienced this issue without running Nova Launcher? Afraid I can't remember if I ever experienced it before installing Nova myself.

---------- Post added at 10:08 AM ---------- Previous post was at 10:05 AM ----------

If you check out my video you'll see that I had the issue with a solid background in QuickMemo.
[G2 Q&A, Help & Troubleshooting] billykxda:
I have not installed Nova on my G2.

Interesting to hear that you get the jagged lines with a solid background. Nevertheless, it still looks like a software issue.
[G2 Q&A, Help & Troubleshooting] BlastTyrantKM:
It's been 24 hrs since I did a full wipe and installed the factory image, and no screen jitters of any kind. So far it's working fine...better than ever, actually. My antutu score is over 1000 higher than my last highest was, just before the screen problem surfaced. This is with all my apps installed and set up. Just stock & rooted
[G2 Q&A, Help & Troubleshooting] billykxda:
Good to hear things are going well!
[G2 Q&A, Help & Troubleshooting] billykxda:
Well I got my G2 replacement yesterday and so far there have been no touchscreen issues. I am hoping that there really is a significant number of G2's without this issue and that I may have stepped into that group.

This thread shows though that some users don't come across the issue for weeks, so I really can't claim any victory just yet.

I still strongly believe that the incidence of G2 touchscreen issues is significant across the population of G2 owners, and that LG ought to come forward to say that they recognize this and that they will address it - as I also believe it's a software fix that's needed.
[G2 Q&A, Help & Troubleshooting] billykxda:
It's Day 4 with my new G2. So far, no touchscreen issues whatsoever.

Way too early to confirm that this replacement device is 100% fine, as it can take time for this issue to surface. I also am taking a different approach with this phone - I am slowing installing my regular apps over time instead of dumping them all on the device in the first hour of ownership. I have no idea if this is material to this issue, but I figured I'd be cautious.

This touchscreen issue is really frustrating for those that have it, and I truly hope that LG addresses it in an upcoming software release.
[G2 Q&A, Help & Troubleshooting] billykxda:
Well...

Guess what...

Yup, my new replacement G2 has this exact same problem.

It has nothing to do with apps having any conflict, as my G2 is almost devoid of my regular line-up of apps. Getting a replacement obviously didn't do the trick. I was previously watching a video (a frequently reported trigger for this issue) and I believe that the G2 just gets "busy", and then gets erratic. Again, I checked in Quick Memo to see if lines that are drawn straight actually get recorded that way, and sure enough, I got EKG-like lines. Turning the screen off/on "fixes" it - for the moment.

This really reinforces my belief that there might be many G2's in the wild with this issue. There are many reports of owners getting 3 or 4 replacements, all of which exhibit this issue.

I will just live with this for now, but all of us who have observed this issue should really put our heads together to figure the best way to get LG's attention. I am confident that this can be addressed with a software fix.
[G2 Q&A, Help & Troubleshooting] Norside:
I doesn't get the ekg-like lines when I draw lines on my g2, (d802), and I have barely noticed the issue..Only a few times in quicksettings.

But we should REALLY get LG to understand that many have this issue, and ask them for an answer, and when (if) a fix comes..

Would be great if manyy could contact LG about this.:good:
[G2 Q&A, Help & Troubleshooting] billykxda:
Agreed.
[G2 Q&A, Help & Troubleshooting] namch29:
I have the same issue with you, drawing line is OK, but there is an area does not response.
[G2 Q&A, Help & Troubleshooting] AharonBLevi:
So it is more likely to be a hardware issue related to the digitizer...?
[G2 Q&A, Help & Troubleshooting] slickwidnick:
Hey, I definitely don't have enough understanding of just how all the components, along with the software that controls those components, acts or interacts together, But from the test I did, seems to me that some part of the software is "breaking" the digitizer, not just making a dead spot residing in system code or something, but permanently damaging the physical digitizer itself
[G2 Q&A, Help & Troubleshooting] REAVER117:
I've had this issue happen to two LG G2s, if you look at the dead band it seems to line up perfectly with the power button on the back of the phone. It seems to me that pressing the power button is putting force on the digitizer from the back and 'killing' that section of the touchscreen. I've swapped the entire internals of a phone to a new digitizer that did not exhibit the issues so I don't see how it could be software related.
[G2 Q&A, Help & Troubleshooting] einsteino:
ok so after you replaced your digitizer, the deadzone returned after some weeks of usage? how long? also was a digitizer only replacement sufficient or you had to also change the lcd? lastly where did you get the replacement digitizer/screen.

Please i hope you dont mind my numerous questions, i have the deadzone and am weighing my options at the moment. thinking of replacing the digitizer but am scared that the problem might come back after a short while.

---------- Post added at 02:56 PM ---------- Previous post was at 02:29 PM ----------

ehm how is your phone going with the replacement screen? is the screen still running flawlessly?
[G2 Q&A, Help & Troubleshooting] MyQuality:
I found a FIX!!!!!!!!!

OK so I had this same problem except mine was Horizontal in the middle of the screen. I have been looking all over through XDA and other places and couldn't find a solution. I tried using a different rom and that didn't seem to do anything.

But EUREKA I found something in the PLAY STORE that did work.

SGS Touchscreen Booster

https://play.google.com/store/apps/details?id=br.shop4apps.touchscreenbooster.com&hl=ru

I wanted to take credit for this, but after I searched around on XDA using "SGS Touchscreen Booster + G2" I found http://xdaforums.com/showthread.php?t=2493667 so I can't take credit, but for anyone looking to fix the "Phantom touches" or the dead strip on the digitizer, look no further. Let me know if this works for you to. I am VERY excited my phone is fixed.
[G2 Q&A, Help & Troubleshooting] AharonBLevi:
I just installed it and after I reboot it, it seems to had stopped the Phantom touches but the dead spot remains, I will continue to test it and report back.
[G2 Q&A, Help & Troubleshooting] MyQuality:
didn't last

So everything was perfect. Then about an hour or 2 later it happened again. This time the App didn't work. Not sure why not. I'll let others know if I get it going again.
[G2 Q&A, Help & Troubleshooting] Kent_99:
I am surprised by what common this problem is. My phone is Sprint branded, the problem started a couple of days after I installed a USB wireless charging adapter on the back of the phone.

I didn't even realized at the beginning that there was a dead zone on the touchscreen, the phone was very usable. I used the phone in this condition for about a week but now it started the phantom touch fiasco, it is barely usable. (an interesting note is, that when the phantom touch appeared the dead zone got slightly larger and is not completely rectangular)

I tried all the solutions that came in my mind, I even disassembled the phone to check the top Touchscreen connector, but no luck.

I have ordered a new touchscreen+LCD assembly, I expect this to solve the problem.

I am very curios what is causing this problems.

How many of you that have this problem use/used wireless charging?
[G2 Q&A, Help & Troubleshooting] einsteino:
I never used wireless charging. where did you order your lcd from, am about to order mine.
[G2 Q&A, Help & Troubleshooting] Kent_99:
I ordered mine on ebay from a seller in china. Their all good in my opinion. Another thing to add, the LCD assembly that I currently have installed is not the original, it was replaced with a Verizon branded one after the first one broke.

I still can't comprehend why and how it goes crazy all of a sudden.
[G2 Q&A, Help & Troubleshooting] einsteino:
Same with me, the LCD i currently have was replaced when the original got broken. I ordered the replacement on aliexpress site(china), it worked flawlessly for a couple of weeks until i noticed some occasional phantom touches and finally deadzone, though i also had a custom ROM running during this period. Right now am about to order another replacement LCD
[G2 Q&A, Help & Troubleshooting] Kent_99:
Was the one you replaced "verzion" branded too?
[G2 Q&A, Help & Troubleshooting] Rayan:
I'll continue to post here despite not having the LG G2 anymore (moved on to an LG G3) but I'm really curious on this topic which unfortunately has not been officially addressed by LG.

Nope, I have never used wireless charging at all.

I don't think these screen issues appear just out of the blue with no reason. There's always something that we have done to the phone that triggers these faults (ghost touches and/or dead zones). With this I'm not trying to say that it's entirely our fault, this phone obviously has some design issues with the touchscreen or some sort of circuit element.

There has been many different people with same symptoms apparently caused by one or several different factors which I'll try to enlist.

1. Drop to hard surface (i.e. concrete)

2. Drop to soft surface (i.e. carpet)

3. After applying a WET screen protector

4. After applying a DRY screen protector

5. After removing a screen protector

6. After a very humid day (environment)

7. After a small amount of water touched the screen

8. After a raise in temperature due to gaming or weather

9. After opening the device

10. After sitting with device in the front or back pocket

11. After a Custom ROM flash

12. After enabling the CPU Throttling on hidden diagnostic menu

13. ???

Also there are many reports of people saying that they "fixed" their LG G2 by doing one or more of the following:

1. Changed the screen panel altogether

2. Re-flashed the original LG G2 ROM through LG's flash tool.

3. Hard reset

4. Fixed after a drop

5. Fixed after applying a piece of paper on a specific are on the motherboard and reassemble.

6. ???

And finally, there are many others reporting that despite their efforts to fix, the problem eventually returns.

In my case I think my dead zone and ghost touches started after one or many of the following factors:

1. Installed Custom ROM (Cloudy Flex)

2. Disabled the CPU throttling feature on the hidden menu

3. Heavy phone use on a very hot and humid day

After many attempts to fix, the only thing that worked for me was flashing the original Jelly Bean image through LG flash tool, which makes me believe that at least in my case, the problem was caused by a bad flash, bad kernel, bad kernel tweak or something software related that only a full factory flash could fix.

Hopefully it will remain functional to the new owner.

Cheers!
[G2 Q&A, Help & Troubleshooting] Arjomer:
Ohh thank god this problem is solved, I'm planning to buy the Lg g2 in the next days and when I noticed the touchscreen issue I almost had a heartatack because I fell inlove with the phone lol. Anyways just to be sure, no one is having issue with this anymore? Thanks
[G2 Q&A, Help & Troubleshooting] einsteino:
Yes it was.
[G2 Q&A, Help & Troubleshooting] Kent_99:
I have replaced my touchscreen and the problem is solved.

I found out what the problem was, 3 traces are interrupted. Now the question is what is the cause? Improper fitting of the LCD assembly? Don't think so.

I'm more inclined to say it's bad design. I looked at the new touchscreen and the traces are redesigned, now their not side by side, but one on top of the other and they are very thick. Also the original sprint touchscreen had a different design, the traces were not printed on plastic but on the glass.
[G2 Q&A, Help & Troubleshooting] Master VD:
Hi! I have got VS980. And there are 3 dead lines. I tried to do hard reset, re-flash the original LG G2 ROM through LG's flash tool and drop my LG but nothing changed :(

And where exactly on the motherboardI should apply a piece of paper?
[G2 Q&A, Help & Troubleshooting] 06VJ:
Guys!! any hopes to fix this dead zone on lg g2

I have this issue in LG G2 D800 from a month and it is very annoying. I love this to phone a lot and I also don't have the manufacture warranty covered now. I tried the following to fix it.

1. Updated the touch firmware.

2. Reset to factory mode.

But no use.

Called up LG support and they don't have any idea other than reset to factory mode. They told me send back the phone to replace the screen and they estimated it may cost 100-150$ for replacement. Is there any other way rather than sending back the phone to LG support to fix it.

Guys please please please help!!!!
[G2 Q&A, Help & Troubleshooting] AharonBLevi:
Same model, same problem, the only solution so far is the screen and digitizer replacement.
[G2 Q&A, Help & Troubleshooting] 06VJ:
how much it costs..? any tutorial to replace..?

How much it costs to replace both screen and digitizer..?

Did you do it yourself or LG support or any local technician..?

Flashing CloudyG3 2.1 resolves the issue..?
[G2 Q&A, Help & Troubleshooting] 06VJ:
Flashed cloudyg3 2.1 but no use.. still deadzone exists. :(
[G2 Q&A, Help & Troubleshooting] AharonBLevi:
I haven't replaced it yet.
[G2 Q&A, Help & Troubleshooting] crazysoccerman:
I made a thread about this, but I'll post here too. I have the exact same issue as you guys, with a dead zone in the exact same spot as that one guy who went through two digitizers noted (where the power button is). This thread existed a year ago when I was deciding between the G2 and 2013 Moto X. Unfortunately the problem is not *FIXED* and it will require a replacement digitizer. Luckily I have an extended warranty. I've gotten everything off the phone and I'm going to Verizon tomorrow to see if they will replace with with a 2013 Moto X rather than another G2.

I LOVED this phone... but this design flaw is a deal breaker :(

Other than this problem I've considered the phone damn near perfect for me.
[G2 Q&A, Help & Troubleshooting] TheJuicer:
Just another update that the warranty replacement LG did back in the fall 2014 for me on my phone is still working fine and have not had issues whatsoever since.
[G2 Q&A, Help & Troubleshooting] scoobydoo99:
I posted a cole of months ago that my G2 had developed this fault, I managed to continue to use the phone (just) by turnig off tap tap, installing the app that allows you to customize the touchscreen sensitivity but eventually I gave up. Returned the phone to LG support (UK) and as the phone was only 9 months old they sorted it under warranty - lens upgrade (? - new screen/digitizer I guess). Hats off to LG support, they had the phone back in a week - I suspect they're well aware of the fault and are geared up to turn them around quickly.

Seems fine now - except I picked up an huawei honor 6 cheaply as a temp phone and it's way better than I expected......argh.
[G2 Q&A, Help & Troubleshooting] Hotro0:
I'm wondering besides the physical differences you noticed in the traces on your new touchscreen, did you notice any differences in the markings on the cables? Like design date differences, revisions, part numbers? Since Lg is not admitting publicly any design issues with their display, I'm wondering if you noticed markings that we can request or look for when ordering a new lcd/digitizer combo? I replaced mine with one from China and two months later it's exhibiting the classic phantom touches. I'm sure if there was a design change made like you noticed in the traces, those flawed units will be distributed and passed on through all the wholesalers for cheap. They will work for awhile then fail do to this design flaw. I want to fix it with the latest touchscreen released otherwise it goes to recycle. No use replacing things that will just fail again. Enough time wasted on this phone! Any info would be much appreciated.
[G2 Q&A, Help & Troubleshooting] tiguy99:
Just replaced my screen on the current G2. Noticed different markings between the replacement LCD/frame assembly vs the oem.

New screen has differnet hue coloring more yellowish greenish vs the oem's crisp white.

New digitizer works great but the lcd has some faint diagonal lines. Will wait a few days to see if they go away. If not, will send this screen back and notate more differences between this unit and my oem screen assembly.

Finally I notice I have more battery drain with this screen vs oem. Also my phone is now warm at the top vs running cool all the time with the other screen.

Makes me think the screen type may have something to do with the battery problems some of us are having with this phone
[G2 Q&A, Help & Troubleshooting] tiguy99:
Bought my already built screen assembly for 62 on ebay this past Friday.

Got it yesterday and installed it myself
[G2 Q&A, Help & Troubleshooting] emgn:
hello guys. my lg g2 g802 screen suddenly stop working. ghost touch and dead zones appears (it was ok yesteday). till the point that i cant use it right now. its just impossible nothing response in the screen

tried so far:

- factory reset

- hard reset

and nothing. i really dont want to buy another screen. what a suppose to do. i really love this phone:confused::confused::confused::confused::confused:
[G2 Q&A, Help & Troubleshooting] Finn81:
Only option is change display module.

Отправлено с моего SCH-I535 через Tapatalk
[G2 Q&A, Help & Troubleshooting] emgn:
you mean lcd and digitizer? o only digitizer.?

after read a lot of pages can someone tell me if i change the Digitizer the phone is going to work again?. :(
[G2 Q&A, Help & Troubleshooting] xlyz:
I got mine back from assistance and to fix it they changed several other pieces too. Do not have the list any more, but digitizer could be only one part of the puzzle. If still under warranty bring it to LG assistance.

Inviato dal mio LG-D802
[G2 Q&A, Help & Troubleshooting] emgn:
thnx. i have no warranty. :( .if can be other pieces this become a nightmare. dont know if sell it or try yo repair :/.